blob: dfad5f56a531ed195d560f06461179c973545fd6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
This file is part of GNUnet
Copyright (C) 2013 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Simon Dieterle
* @author Andreas Fuchs
* @author Christian Grothoff
*
* @file
* API to access an audio microphone; provides access to hardware microphones
*
* @defgroup microphone Microphone library
* Provides access to hardware microphones.
* @{
*/
#ifndef GNUNET_MICROPHONE_SERVICE_H
#define GNUNET_MICROPHONE_SERVICE_H
#ifdef __cplusplus
extern "C"
{
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
#include "gnunet_util_lib.h"
/**
* Process recorded audio data.
*
* @param cls clsoure
* @param data_size number of bytes in @a data
* @param data audio data to play
*/
typedef void (*GNUNET_MICROPHONE_RecordedDataCallback)(void *cls,
size_t data_size,
const void *data);
/**
* Enable a microphone.
*
* @param cls clsoure
* @param rdc function to call with recorded data
* @param rdc_cls closure for @a dc
* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
*/
typedef int (*GNUNET_MICROPHONE_EnableCallback)(void *cls,
GNUNET_MICROPHONE_RecordedDataCallback rdc,
void *rdc_cls);
/**
* Function that disables a microphone.
*
* @param cls clsoure
*/
typedef void (*GNUNET_MICROPHONE_DisableCallback)(void *cls);
/**
* Function to destroy a microphone.
*
* @param cls clsoure
*/
typedef void (*GNUNET_MICROPHONE_DestroyCallback)(void *cls);
/**
* A microphone is a device that can capture or otherwise produce audio data.
*/
struct GNUNET_MICROPHONE_Handle
{
/**
* Turn on the microphone.
*/
GNUNET_MICROPHONE_EnableCallback enable_microphone;
/**
* Turn the microphone off.
*/
GNUNET_MICROPHONE_DisableCallback disable_microphone;
/**
* Destroy the microphone. Called by #GNUNET_MICROPHONE_destroy.
*/
GNUNET_MICROPHONE_DestroyCallback destroy_microphone;
/**
* Closure for the callbacks.
*/
void *cls;
};
/**
* Create a microphone that corresponds to the microphone hardware
* of our system.
*
* @param cfg configuration to use
* @return NULL on error
*/
struct GNUNET_MICROPHONE_Handle *
GNUNET_MICROPHONE_create_from_hardware (const struct GNUNET_CONFIGURATION_Handle *cfg);
/**
* Destroy a microphone.
*
* @param microphone microphone to destroy
*/
void
GNUNET_MICROPHONE_destroy (struct GNUNET_MICROPHONE_Handle *microphone);
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
#endif
/** @} */ /* end of group */
/* end of gnunet_microphone_lib.h */
|
